Flora of North America species comparison

unarmed.

10-60(-75) cm, from caudices, caudices ascending to vertical.

blade undivided or more commonly divided or compound, base cordate, sometimes truncate or cuneate, margins entire, toothed, or incised;

venation pinnate or palmate.

(2-)3-6(-8), primarily 3-foliolate with each leaflet pinnatifid to dissected;

petiole 6-8(-12) cm;

terminal leaflet petiolulate, ovate in outline, (2.5-)3-6(-8) cm, base cuneate, margins pinnatifid to dissected throughout, apex narrowly acute, surfaces villous;

lateral leaflets 2x-parted, pinnatifid; ultimate segments 2-3 mm wide.

1-flowered;

peduncle woolly or densely villous, glabrate;

involucral bracts 3, occasionally more, 1-tiered, ±similar to basal leaves, 3-foliolate, ovate in outline, bases distinct;

terminal leaflet petiolulate, 2.5-7 cm (2.5 cm in flower, 7 cm or less in fruit), margins pinnatifid throughout, apex narrowly acute, surfaces villous;

lateral leaflets 2x-parted, pinnatifid; ultimate segments 2-3 mm wide.

terminal or axillary, racemes, cymes, umbels, panicles, or spikes, or flowers solitary, flowers pedicellate or sessile.

sepals 5-7, white, tinged purple (rarely abaxially blue proximally, white distally, and adaxially white), ovate to obovate, rarely elliptic, 15-30 × 10-17(-19) mm, abaxially hairy, adaxially glabrous;

stamens 150-200.

bisexual, sometimes unisexual, inconspicuous or showy, radially or bilaterally symmetric;

sepaloid bracteoles absent;

perianth hypogynous;

sepals usually imbricate, 3-6(-20), distinct, often petaloid and colored, occasionally spurred;

petals 0-26, distinct (connate in Consolida), plane, cup-shaped, funnel-shaped, or spurred, conspicuous or greatly reduced;

nectary usually present, rarely absent;

stamens 5-many, distinct;

anthers dehiscing longitudinally;

staminodes absent (except in Aquilegia and Clematis);

pistils 1-many;

styles present or absent, often persistent in fruit as beak.

achenes, follicles, or rarely utricles, capsules, or berries, often aggregated into globose to cylindric heads.

body ellipsoid, 3-4 × ca. 1.5 mm, not winged, villous;

beak curved or recurved, reflexed with age, (18-)20-40(-50) mm, long-villous, plumose.

spheric, rarely cylindric;

pedicel 15-20(-22) cm.

1-many per ovary, never stalked, not arillate;

endosperm abundant;

embryo usually small.

=16.